Fix point_camera transmit state in multiplayer

src/game/server/info_camera_link.cpp

@@ -145,9 +145,11 @@ CBaseEntity *CreateInfoCameraLink( CBaseEntity *pTarget, CPointCamera *pCamera )
 //-----------------------------------------------------------------------------
 void PointCameraSetupVisibility( CBaseEntity *pPlayer, int area, unsigned char *pvs, int pvssize )
 {
+	int nPlayerIndex = pPlayer->entindex();
+
 	for ( CPointCamera *pCameraEnt = GetPointCameraList(); pCameraEnt != NULL; pCameraEnt = pCameraEnt->m_pNext )
 	{
-		pCameraEnt->SetActive( false );
+		pCameraEnt->TransmitToPlayer( nPlayerIndex, false );
 	}
 	
 	intp nNext;
@@ -175,7 +177,7 @@ void PointCameraSetupVisibility( CBaseEntity *pPlayer, int area, unsigned char *
 			if ( pCameraEnt )
 			{
 				engine->AddOriginToPVS( pCameraEnt->GetAbsOrigin() );
-				pCameraEnt->SetActive( true );
+				pCameraEnt->TransmitToPlayer( nPlayerIndex, true );
 			}
 		}
 	}

src/game/server/point_camera.cpp

@@ -52,6 +52,9 @@ CPointCamera::CPointCamera()
 	m_bFogEnable = false;
 	m_bFogRadial = false;
 
+	// By default, transmit to everyone
+	m_bitsTransmitPlayers.SetAll();
+
 	g_PointCameraList.Insert( this );
 }
 
@@ -74,34 +77,43 @@ void CPointCamera::Spawn( void )
 	SetActive( m_bIsOn );
 }
 
+//-----------------------------------------------------------------------------
+// Purpose: Transmit only to players who are in PVS of the camera and its link
+//			See PointCameraSetupVisibility
+//-----------------------------------------------------------------------------
+int CPointCamera::ShouldTransmit( const CCheckTransmitInfo* pInfo )
+{
+	if ( m_bitsTransmitPlayers.IsBitSet( pInfo->m_pClientEnt->m_EdictIndex ) )
+		return FL_EDICT_ALWAYS;
+
+	return FL_EDICT_DONTSEND;
+}
+
 //-----------------------------------------------------------------------------
 // Purpose: Override ShouldTransmit since we want to be sent even though we don't have a model, etc.
 //			All that matters is if we are in the pvs.
 //-----------------------------------------------------------------------------
 int CPointCamera::UpdateTransmitState()
 {
-	if ( m_bActive )
-	{
-		return SetTransmitState( FL_EDICT_ALWAYS );
-	}
-	else
-	{
-		return SetTransmitState( FL_EDICT_DONTSEND );
-	}
+	return SetTransmitState( FL_EDICT_FULLCHECK );
 }
 
+//-----------------------------------------------------------------------------
+// Purpose: Toggle networking of the camera to the specified player
+//-----------------------------------------------------------------------------
+void CPointCamera::TransmitToPlayer( int nPlayerIndex, bool bTransmit )
+{
+	if ( bTransmit )
+		m_bitsTransmitPlayers.Set( nPlayerIndex );
+	else
+		m_bitsTransmitPlayers.Clear( nPlayerIndex );
+}
 
 //-----------------------------------------------------------------------------
 // Purpose: 
 //-----------------------------------------------------------------------------
 void CPointCamera::SetActive( bool bActive )
 {
-	// If the mapmaker's told the camera it's off, it enforces inactive state
-	if ( !m_bIsOn )
-	{
-		bActive = false;
-	}
-
 	if ( m_bActive != bActive )
 	{
 		m_bActive = bActive;

src/game/server/point_camera.h

@@ -29,7 +29,9 @@ public:
 
 	// Tell the client that this camera needs to be rendered
 	void SetActive( bool bActive );
-	int  UpdateTransmitState(void);
+	int  ShouldTransmit( const CCheckTransmitInfo* pInfo );
+	int  UpdateTransmitState( void );
+	void TransmitToPlayer( int nPlayerIndex, bool bTransmit );
 
 	void ChangeFOVThink( void );
 
@@ -56,6 +58,8 @@ private:
 	// Allows the mapmaker to control whether a camera is active or not
 	bool	m_bIsOn;
 
+	CBitVec< MAX_PLAYERS > m_bitsTransmitPlayers;
+
 public:
 	CPointCamera	*m_pNext;
 };